Question

The primary and secondary valences of Co in [Co(en)₃]Cl₃ respectively are:

• A. 3, 3 \hspace{1cm}
• B. 0, 3
• C. 6, 3 \hspace{1cm}
• D. 3, 6

Hint:

Primary valence refers to the oxidation state of the central metal ion, and secondary valence refers to the number of ligand bonds around it.

Answer 1

The Correct Option is C

For the coordination complex \([Co(en)_3]Cl_3\), cobalt (Co) exhibits a primary valence (oxidation state) of 3. The secondary valence, representing the number of ligand bonds, is 6, stemming from the three ethylenediamine (en) ligands present.